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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Calderón-Zygmund singular integral operators have been extensively studied for almost half a century.
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Drug Development in the 21st Century: Medicines, Man and Receptors
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THE SHAPE OF MEDICINES TO COME: PHARMACEUTICALS IN THE 21ST CENTURY
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The pharmaceutical sciences are advancing rapidly in the post-genomic era of the 21st century with the completion of the human genome, as well as those of many other organisms including bacteria and parasites, and the rapid advances in proteomics.
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Pancreatic cancer is not only common, but also extremely difficult to treat, for which it has been called "the challenge of the twenty-first century".
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| | Since the beginning of the last half century, the science of hydrology through successive steps of development has advanced to the realm of quantitative analysis. Engineers employed empirical methods to compute river discharges from precipitation data in answer to the ever-increasing demands made upon hydrologic analyses for engineering works. Yet for the phenomena of conflux of flows from precipitations, there exist only meager and fragmental quantitative analyses, without, so far, a systematic study... | | 半世紀來,水文学在發展的过程中已進入了定量分析的途徑;工程師們曾用各种經驗性的方法依據降水的资料推演河槽裹水流的現象,以应各种工程建設对於水文分析的要求。但是对於降水集流的过程始終祇有一些零星、片面的数值分析,没有一套完整的理論系統,因此阻碍着水文学在理論与应用方面的發展。作者曾用流体力学的分析法初步建立了降水集流的理論系統,把降水集流的过程分為三個階段:雨降地面逕流的產生、地面流、槽流之滙集,分别予以分析。本文便是其中第一階段,亦即最基本水文現象的分析。这些建立了的理論可以用為指導各种水文分析的南針,用為評論各种水文計算法的依據,並可用以創造一种近似而合理的方法,从降水資料推算逕流資料。本文中作者貢献一套理論,以分析地面點上降雨產生逕流的过程,揭發了基本水文現象的本質,最後並列舉实例的計算。早年郝登(R.E.Horton)曾依據郝納(W.W.Homer)的地面流实驗資料建立了一套在小地域內降水和逕流關係之理論,其後学者們根據他的理論和方法,用人工降雨法或流域資料实測法來確定降水和逕流間的關係。郝登的分析並没有从準確的動力学观點出發。在实際分析中發生了欠缺理論基礎的根本問題。这方面作者持着不同的意見。本文中根... | | 文摘来源 | | (Consisting of two articles, the first one was published in 1938 in the Singchow Semi-monthly Singapore, the second is a much more detailed one written in 1957. Followingis a general sketch of both the two articles.) Ⅰ. What is the Malayan Stock? In common sense, Malayan stock means the Malayan race or Brown race, which isone of the five human races of the world. The classic method of the classification ofhuman races according to their skin colour gave the Malayans the pseudo-scientific name"Brown race" whi... | | 林惠祥同志三十多年来除了对人类学(包括古学、民族学)进行系统的研究,并获得很大的成就和贡献外,他一生对南洋问题的研究,也曾下过工夫,做过不少工作和贡献。“南洋马来族与华南古民族的关系”这篇论文是林惠祥同志关于南洲问题最后的遗著。前篇于一九三八年以“马来人与中国东南方人同源说”为题曾在南洋发表过,后篇是他二十年后对这问题进一步深入研究的成果,提出更丰富、更可靠的有关人类学(包括考古学、民族学)的材料和证据,把我国和南洋民族的历史关系以及将东南亚这一大片地方过去被遗忘的历史补充起来,这是他三十年多年来对南洋研究的重要贡献,也是他一生对南洋问题研究总结的一部份。 | | 文摘来源 | | The discovery of the larval form of the species of Asymphylodora Looss (1899) dated back to the time of von Baer (1827), who described Cercaria paludinae impurae, De Filippi (1854) recorded from the same snail host a distome bearing the same name. For one and half century knowledges regarding the developmental life history of the well-known type of the genus, A. tincae, have gradually accumulated. Small as it is, the worm, however, has received the attention of many a distinguished helminthologists su... | | 1.福建省的两种側殖吸虫,巨口侧殖吸虫(Asymphylodora macrostoma Ozaki,1925)及日本侧殖吸虫(A. japonica Yamaguti,1928)的生活史均經闡明。2.巨口侧殖吸虫的终末宿主为刺鲃(Punctius sp.),貝类的中間宿主为川蜷贝(Melania peregrinorum Heude)。日本侧殖吸虫的终末宿主为麦穗魚(Pseudorasbora parva (T. and S.)),及鯉魚(Cyprinus carpio L.),貝类中間宿主为两种的纹沼螺(Parafossarulus eximius (Fruenfeld)及P. striatulus (Benson))。3.幼虫各期的形态經观察和叙述,特別关于排泄系統的构造經詳細的探討。4.两种侧殖吸虫幼虫期的形态,特别关于排泄囊的构造以及穿刺腺的存在,与侧殖Asymphylodora Looss,1899原属有很大的不同,作者建議创立一个新属Orientotrema Tang,1962 Gen. Nov.借以容納有管状排泄囊的种类。属的特征經叙述,末后并附侧殖亚科(Asymphylodorinae)各属... | | 文摘来源 | |   | | << 更多相关文摘 |
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